diff --git a/plotnine/themes/theme_matplotlib.py b/plotnine/themes/theme_matplotlib.py
index d6b44d2bb..c800bede3 100644
--- a/plotnine/themes/theme_matplotlib.py
+++ b/plotnine/themes/theme_matplotlib.py
@@ -88,7 +88,7 @@ def __init__(self, rc=None, fname=None, use_defaults=True):
             plot_caption=element_text(
                 ha="right",
                 va="bottom",
-                ma="right",
+                ma="left",
                 margin={"t": m, "units": "fig"},
             ),
             plot_margin=m,